Maintaining DIV Scroll Position on PostBack without Update Panel

<script type="text/javascript">
        window.onload = function () {
            var h = document.getElementById("<%=keep.ClientID%>");
            document.getElementById("divTest").scrollTop = h.value;
            alert(h.value);
        }
      function SetDivPosition(){
        var intY = document.getElementById("divTest").scrollTop;
        var h = document.getElementById("<%=keep.ClientID%>");
        h.value = intY;
      }
    </script>

<div önscroll="SetDivPosition()" id="divTest">
</div>

var xPos, yPos;
       var prm = Sys.WebForms.PageRequestManager.getInstance();
       prm.add_beginRequest(BeginRequestHandler);
       prm.add_endRequest(EndRequestHandler);
 

       function BeginRequestHandler(sender, args) {
 

           yPos = $('#<%=divgvlocation.ClientID %>').scrollTop();
       }
       function EndRequestHandler(sender, args) {
 
           $('#<%=divgvlocation.ClientID %>').scrollTop(yPos);
       }